So sorry about your lost sim. This happened to me about 2 weeks ago, and below is the message from MTN Customer Care when I contacted them. They will also send you a sim swap...
I am sorry about your missing line.
You will not be able to do a sim swap on a line that was not registered by you. However, ask MyCustomer who registered the line to visit...
I am deeply sorry for your missing line.
Kindly contact your bank to prevent an authorized access to your bank account if the line is linked to your bank accounts.
Sim swap by...
